 Using Tuxedo, PeopleTools app server domains are created as a collection of processes servicing specific needs and clients in addition to web server requests.Within a domain, several types of related programs can be launched, including remote call COBOL, Application Engine, and BI Publisher programs.Process Scheduler Server

Like the app server, the process scheduler server, or "scheduler," is built on BEA Tuxedo and is deployed as a collection of processes designed to launch and schedule various programs types.